The Sims 4 version (released March 14, 2023) is a landmark "Infant Update" that fundamentally altered the game's generational mechanics by introducing a brand-new life stage. This update transitioned newborns into a more dynamic and interactive early childhood phase, bridging the gap between infants and toddlers. Core Gameplay Additions: The Infant Life Stage
: A variety of infant-specific furniture was added, including several styles of cribs (some of which are portable or upgradable with mobiles) and sensory toys. Quality of Life and Bug Fixes
: Newborns now reflect the full range of skin tones available in the game and retain the eye color they will have for life.
: Fixes were implemented for toddlers who would either not run at all or never stop running when the "Run Around" interaction was used.